Travel Trajectory Frequent Pattern Mining Based on Differential Privacy Protection

Table 1

Location data sample.

Encrypted id	Longitude	Latitude	City	Grid	Time (m)
W90H0925	118.803655	32.067106	Nanjing	0203	10/1/14:30
W90H0925	118.784718	32.073593	Nanjing	0209	10/1/16:38
W90H0925	118.788294	32.066525	Nanjing	0221	10/1/17:00
W90H0925	118.797348	32.072255	Nanjing	0347	10/1/18:26
W90H0925	118.796001	32.064865	Nanjing	0309	10/1/19:55
W90H0925	118.788294	32.066525	Nanjing	0221	10/1/22:24